{
  "x402Version": 2,
  "id": 6425,
  "slug": "6425",
  "resource": "https://api.usenami.io/v1/perp/basis",
  "description": "Per-venue basis for one crypto perpetual — mark versus index price, basis_bps = (mark−index)/index×10000, and contango/backwardation structure, across tracked CEX and DEX venues. Every venue has an index except Crypto.com, Variational and dYdX; dYdX publishes one oracle price, which is its mark. `venues_without_index` names the ones missing. Each venue also carries liquidity_state (live/dead/unknown), and a market with no trading is flagged unreliable however clean its basis looks.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x1538726707212F4dB3EB67cEc0910422A310475c",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "5000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "canonical_id": {
              "description": "Disambiguates a ticker that names two unrelated assets; a 409 on the ticker alone names the candidates.",
              "required": false,
              "type": "string"
            },
            "ticker": {
              "description": "Base ticker (e.g. BTC, ETH). Required.",
              "required": true,
              "type": "string"
            }
          },
          "type": "http"
        },
        "output": {
          "example": {
            "items": [
              {
                "asset_class": "crypto",
                "basis_bps": -2.31,
                "basis_reliable": true,
                "index_price": 60292.9,
                "liquidity_state": "live",
                "mark_price": 60278.9,
                "structure": "backwardation",
                "updated_at": "2026-06-27T21:00:00Z",
                "venue": "paradex"
              }
            ],
            "methodology": "basis_bps = (mark_price − index_price)/index_price × 10000; structure = basis sign (contango/backwardation/flat/unknown)",
            "ticker": "BTC",
            "venues_count": 18,
            "venues_without_index": [
              "Crypto.com",
              "Variational",
              "dYdX"
            ]
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "properties": {
              "method": {
                "type": "string"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "api.usenami.io",
  "lastUpdated": "2026-09-12T19:57:24.862Z",
  "quality": {
    "calls30d": 3,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-09-12T19:57:23.842Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.usenami.io",
    "manifest_name": "api.usenami.io",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}